Cleaning and liquid contact with solids – Apparatus – With plural means for supplying or applying different fluids...
Reexamination Certificate
1999-03-31
2001-05-01
Coe, Philip R. (Department: 1746)
Cleaning and liquid contact with solids
Apparatus
With plural means for supplying or applying different fluids...
C134S099100, C134S104300, C134S121000, C134S186000, C210S369000, C210S378000
Reexamination Certificate
active
06223756
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to an apparatus for degreasing of solid parts and of mass-produced parts, such as small metallic parts, comprising a drum with a perforated drum wall rotatable and drivable around a vertical axis, and a charge opening disposed on the top side and a discharge opening disposed at the floor side and closable with an axially movable floor closure, a stationary outer ring channel surrounding the drum and exhibiting at the bottom an outer ring trough with discharge ports, an inner ring channel disposed between the outer ring channel and the drum, axially shiftable with a set member, and including an inner ring trough at the bottom as well as feed lines for treatment agents to be delivered to the drum.
2. Brief Description of the Background of the Invention Including Prior Art
A device of the initially recited kind is already known from the German printed patent document DE-41 00 414 C1. According to the teachings of this reference, the inner ring channel can in fact be moved from a starting position, releasing the drum perforations, into an elevated position covering the drum perforations, however, it is not possible to seal the drum toward the outside. A flooding of the material disposed in the drum as well as the evacuation or the pressurization of the inner space of the drum is therefore not possible. The practicable and feasible treatment methods for the degreasing and drying as well as possibly conserving of solid or mass-produced parts are therefore limited and have to be extended over time until such predetermined effect is being achieved. In addition, a device for the oil impregnation of sintered parts is known from the international printed patent document WO 97/29853 (entry into U.S. national phase under Ser. No. 08/945,285), wherein the drum can be sealed toward the outside in order to flood the parts disposed in the drum and to subject them to an underpressure. The pressure-sealed closure of the drum is thereby performed immediately at the drum, i.e. at the rotatable part. This requires a substantial construction expenditure for the transfer from the stationary casing part to the rotatable drum, such as for example the feeding of treatment liquid or, respectively, the blowing in or the suctioning-off of air. This renders the apparatus extensive in its construction and difficult in its operation.
It is object of the present invention to furnish a method and an apparatus which is or, respectively, are capable to detect simultaneously both groups of gases, namely oxidizable gases as well as reducible gases with one and the same sensor based on metal sensors, such as in particular the known metal oxide sensors.
SUMMARY OF THE INVENTION
1. Purposes of the Invention
It is an object of the present invention to produce a device which is simple in its construction and with which there can be performed a multitude of methods for degreasing and subsequent treatment for a complete degreasing of solid or mass-produced parts.
These and other objects and advantages of the present invention will be come evident from the description which follows.
2. Brief Description of the Invention
According to the present, this object is achieved in that the inner ring channel is formed to be adjustable from a starting position, releasing and freeing the drum perforations, into an intermediate position, covering the drum perforations on the outside, and into a sealing position sealing off the drum.
The advantages associated with and accomplished according to the present invention comprise in particular that now a sealed container is produced by the inner ring channel and the drum, wherein the solid and mass-produced parts can be flooded. The solid or mass-produced parts are thereby intensively subjected to the respective liquid, for example, a degreasing liquid. This process corresponds to a soaking, which substantially facilitates the subsequent dissolving of the oil layer from the precedingly performed deformation method. Independently therefrom, the conventional method steps, such as the spinning off of oil or oil centrifuging, the spraying with the degreasing agents or other treatment agents, and the periodic centrifuging and drying can be performed as required. The apparatus according to the present invention therefore achieves a substantially larger application range as compared to known apparatuses, where the constructive expenditures are relatively low. In this way, the treatment of the parts can be performed more intensively than in the past, such that these parts are transformed into a fat-free state, which corresponds and meets also stringent requirements to an absence of a grease coating or freedom from grease.
An apparatus for degreasing solid and/or mass-produced parts, such as small metallic parts, comprises a drum having a drum floor and having a perforated drum wall furnished with perforations. The drum is rotatable and drivable around a vertical axis. A charge opening is furnished at a top of the drum. An axially movable floor closure is disposed in an area of a bottom of the drum. A discharge opening is furnished at the bottom of the drum. The discharge opening is closable by the axially movable floor closure. A stationery outer ring channel surrounds the drum and exhibits at the bottom an outer ring trough having a discharge port. An inner ring channel is disposed between the outer ring channel and the drum and axially adjustable by way of an adjustment member and includes an inner ring trough at the bottom. The inner ring channel is formed adjustable in position from between a starting position, releasing the drum perforations to be open, a center position covering the drum perforations on the outside, and a sealing position for sealing the drum perforations. Feed lines are leading into the drum for feeding treatment agent into the drum.
The drum floor can be furnished with a turn-out bore. A sealing ring can be furnished at the inner ring trough of the inner ring channel. The sealing ring can be insertable into the turn-out bore in the drum floor.
At least one radial discharge channel can be disposed in the drum floor. The radial discharge channel can join outside to the inner ring channel and inside into a slot disposed between the drum floor and the floor closure.
A first sealing ring can be furnished in the slot between the drum floor and the floor closure. A second sealing ring can be furnished below the radial discharge channel.
A frame can support the drum. A third sealing ring can be furnished at an upper edge of the inner ring channel and rest sealingly at the frame above the drum perforations.
The third sealing ring can be formed as a profile ring with an inner axial sealing face and with an upper radial sealing face for resting at fourth sealing rings of the frame in the sealing position of the inner ring channel and with a lower radial sealing face for resting at a seal at the outer ring channel in the starting position of the inner channel.
An annular plate can be sealingly connected to the fourth sealing rings and be disposed at the frame in an area around the charge opening. Several radial supply channels can be furnished serving as a feed and passing through the annular plates. The several radial supply channels can be closed by respective ones of several valves. The several radial supply channels can join into the drum. At least one of the several radial supply channels can be furnished for feeding in degreasing agent. At least one of the several radial supply channels can be furnished for blowing in compressed air.
A storage funnel can be provided for closing the charge opening. A slider can be furnished below the storage funnel for closing the charge opening. The slider can be formed as a drip pan furnished with a discharge.
The slider can be formed for providing an air-impermeable closure of the charge opening by placement of a fifth sealing ring surrounding the charge opening and supported on the annular plate.
At least one of the several radial supply channels can be furnished for c
Coe Philip R.
Kasper Horst M.
Turbo-Clean GmbH
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